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3 min readTo write to standard input in Elixir, you can use the IO module's puts or write functions. These functions allow you to write data to the standard input stream. You can also use the IO.write function to write raw data directly to the standard input stream. Additionally, you can use the IO.binwrite function to write binary data to the standard input stream. Overall, writing to standard input in Elixir is simple and can be done using the various functions provided by the IO module.
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2 min readIn Elixir, you can concatenate charlists by using the ++ operator. Charlists are lists of integers, where each integer represents a character in the list. To concatenate two charlists, simply use the ++ operator between the two lists. For example: list1 = 'hello' list2 = 'world' concatenated_list = list1 ++ list2 # Resulting charlist: 'helloworld' Remember that charlists are different from strings in Elixir, as strings are represented by double-quoted binaries.
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8 min readTo optimize views in Oracle, you can follow some best practices.Limit the number of columns - Only select the columns that are necessary for the view, as selecting unnecessary columns can impact performance.Use indexed columns - If possible, include columns that are indexed in the view to improve query performance.Avoid complex joins - Try to avoid using complex joins in the view definition, as it can slow down queries.
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4 min readIn Elixir, you can define shared constants by using the @ symbol followed by the constant name. These shared constants can be used across different modules within the same project. For example, you can define a shared constant named PI in a module like this: @PI 3.14159. This constant can then be accessed and used in other modules by referring to ModuleName.PI. This approach helps in keeping the codebase organized and consistent by centralizing commonly used values.
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7 min readIn Elixir, extending an existing protocol can be done by defining a new implementation for the protocol. When you want to extend a protocol, you need to define a new module that implements the protocol and add the implementation for the new functionality.First, you need to define the protocol with the existing functions that you want to extend. Next, create a new module that implements the protocol and add the new functions that you want to use to extend the protocol.
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5 min readIn Elixir, you can iterate through a list of maps using the Enum module's functions. One common approach is to use the Enum.map/2 function, which applies a given function to each element of the list and returns a new list containing the results.For example, suppose you have a list of maps representing products: products = [ %{name: "Product 1", price: 10.99}, %{name: "Product 2", price: 20.50}, %{name: "Product 3", price: 15.
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4 min readIn Elixir, we can reduce a list of maps using the Enum.reduce/2 function. This function allows us to iterate over each element in the list and perform a specific operation on each map. By providing an initial accumulator value and a function to combine each map with the accumulator, we can effectively reduce the list to a single value.For example, if we have a list of maps representing sales data and we want to calculate the total revenue, we can use Enum.
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4 min readIn Elixir, you can convert a float to an integer using the round/1 function from the Float module. This function takes a float as input and returns the nearest integer. For example, if you have a float value 5.6, using round(5.6) will return 6. Additionally, you can use other functions like ceil/1 to round up to the nearest integer or floor/1 to round down to the nearest integer. Just remember to import the Float module before using these functions in your code.
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6 min readTo find the difference between two tables in Oracle, you can use the MINUS operator. This operator is used to retrieve rows from the first query that are not present in the second query.You can write a query with the MINUS operator to compare the data in two tables and return only the rows that are unique to one table. This will help you identify the differences between the two tables.For example, the query may look like this: SELECT column1, column2, ...
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4 min readIn Elixir, you can expand multiple macros by using the use macro. By using the use macro, you can easily include multiple macros in a module without having to explicitly call each macro individually. Simply list the macros you want to expand within the use macro, separated by commas.
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4 min readTo pass data from the terminal in Elixir, you can specify command line arguments when running your Elixir application. These command line arguments can be accessed using the System.argv function, which returns a list of strings representing the arguments passed to the application.For example, if you run the following command in the terminal: elixir my_app.exs arg1 arg2 You can access the command line arguments arg1 and arg2 in your Elixir application using System.argv.